Bituminous pipe seal



Oct. 11, 1949. M. GREENBAUM BITUMINOUS PIPE SEAL Filed July 10, 1947 ATTORNEX Patented Oct. 11, 1949 BITUMINOUS PIPE i SEAL "Maurice Greenbaum, Detroit, Mich., assignor of one-half to William L. Zopli, Ferndale, Mich.

' Applicatiorilluly 10, 1947. sedative-Jennie Thisinvention relates to pipe seals, and more particularly to sealing means interposed between two pipesof different internal-diameter for sealing the connection therebetween, as in the case of. water; gas or sewer pipes and mains.

.111 the construction of houses, or other buildings, for example, it is necessary to form a junction between a small'diameter sewer outlet pipe such as a metal pipe, and an outside crockery sewer pipe of relatively larger diameter. Heretofore various means havebeen employed to effect aseal at the junctionbetween the two pipes. For example, it is common practice to melt lead and pour the same into the joint. Or for that -matter any other meltable sealing substance such as a tar composition or the like have been used.

The difilculty with such practice is the comparatively high cost in making the connection as well as the difficulties of melting the substance used and the danger of spilling said molten sub stance upon the worker.

It is the object of this invention to provide a prefabricated bituminous pipe sealing element which is substantially doughnut shaped and which is slidably mounted upon the pipe of smaller diameter.

It is the further object of this invention to asemble the two pipes with the smaller projecting into the hollow bell-shaped end of the larger pipe, and secondly, to force said sealing element toward the outer end of the smaller pipe and tightly into the enlarged opening within the bellshaped end of the larger pipe.

It is the further object of this invention to provide a method of joining and sealing the bell and spigot ends of a pair of pipe sections of different diameter.

It is the further object of this invention to provide a hollow circular prefabricated sealing element preferably constructed of a bituminous substance such as asphalt or tar, which when in-- terposed within the junction of said pipes provides a very satisfactory, effective and inexpensive seal therebetween.

These and other objects will be seen from the following specification and claims in conjunction with the appended drawing in which:

1 is a fragmentary elevationa'l section illustrating the junction of two pipes of different diameter, and with the sealing means interposed therebetween.

2 is a partially broken away fragmentary elevational section illustrating said junction with the sealing means shown upon the smaller pipe r 1 Claim. (Cl. 285-162') 2 prior. to its longitudinal projection within-said junction; and

3 is a perspective View of 'the prefabricated sealing-element.

It-will be understood that therabove drawing illustrates merely 1 one. preferable embodiment, of the invention, and. that other embodiments are contemplated within :thescope: ofthe claims hereafter set out.

"Referringto the.; dra-wing, the-pipe section. II with spigot endmIZ is projected within .the bellshaped enlarged end 13.ofxitheilargerpipesem tion M, as fragmentarily shown in Figure 1. For illustration, it will be assumed that the pipe I4 of larger diameter is a standard sewer pipe, and that pipe I l is the metal outlet pipe of smaller diameter which is to be joined with the former.

A prefabricated hollow cylindrically-shaped sealing element I5, Figure 3, is slidably mounted upon the smaller pipe II as in Figure 2, and is adapted for manual projection into the hollow enlarged bell-end portion I3 of pipe I4 as illustrated in Figure 1.

Element I5 is non-metallic, being prefabricated and molded from a bituminous substance such as asphalt or tar. Element I5 is relatively flexible, resilient, and is tapered inwardly slightly at its outer annular surface It.

As shown in Figure 3, element I5 is split transversely at IT, or is so formed preferably whereby its free ends may be resiliently expanded for fitting said sealing element over the enlarged spigot end [2 of pipe H.

Said element is sufiiciently resilient to reassume its original shape to effectively engage the outer surface of pipe II, upon which it may be longitudinally projected.

The bituminous sealing element I5 after fabrication and prior to use is expanded and slidably mounted upon pipe section I I over its spigot end I2 as in Figure 2.

In the next step the inner annular wall and the abutment wall I8 of the bell-shaped portion I3 of pipe I4 are painted over or otherwise covered with a suitable asphalt or other paint having good adhesive or cohesive characteristics relatively to the bituminous element I5.

The outer end of the pipe I I adjacent its spigot I2 is similarly painted or covered.

The spigot end I2 of pipe II is now properly positioned and aligned within the enlarged bell end I3 of crockery pipe I4 as shown in Figure 2.

In the final step the bituminous sealing element I5 is tapped by a mallet or other suitable means: to project the same longitudinally along pipe H.

and tightly into the hollow enlarged portion I3 of pipe I4. In its final position its bottom wall cooperatively bears against abutment wall l8 of pipe I4. In this final position the inner and outer surfaces of the sealing element are now in contact with and adhere to the painted portions of the two pipes above recited.

Thus an effective seal is provided between the two pipes H and M at their junction.

Element I5 is preferably tapered at It to facilitate its entry into the hollow bell end [3 of pipe It will be understood that the above-described sealing element is effective as a seal between pipes of different diameter regardless of the material from which the pipe sections are constructed. For example, the seal is efiective between two metallic sections, two crockery sections, as well as between a metallic and a crockery section.

The split molded bituminous sealing element ['5 is loosely mounted over the spigot end of the house sewer outlet pipe l l which is usually already in-place projecting out from the basement wall of the house or other structure. The crockery sewer pipe [4, after the painting operation above I referred to, is easily projected over the spigot end of pipe I I. Element 15 is then tapped along pipe H and into the hollow bell end l3 of pipe l4 to complete the seal.

Having described my invention reference should U now be had to the claim which follows for determining the scope thereof.

MAURICE GREENBAUM.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,240,287 Woodward Sept. 18, 1917 1,434,952 Johnson Nov. 7, 1922 1,493,245 Clark May 6, 1924 1,971,100 Fischer Aug. 21, 1934 2,285,046 Murdock June 2, 1942 2,298,119 Gebert Oct. 6, 1942 2,383,582 Barbehenn Aug. 28, 1945 2,419,592 Richardson Apr. 29, 1947 FOREIGN PATENTS Number Country Date 118,040 Germany June 21, 1900 

